It was reportedly detected by an autonomous underwater vehicle which took sonar images of the site and matched them with the dimensions of the lost Japanese warship.
Using sonar equipment and autonomous underwater vehicles, they navigated trenches, volcanoes and underwater mountains, searching for a debris field up to six kilometers below the surface.
There's also a sonar scanner and after that will send in divers to find the position of the black box and hopefully we can retrieve the black box and the flight wreckage.
The submarine's sonar picks up an approaching submarine in the shape of an octopus that is controlled by Count Olaf, but it swiftly speeds away because of a large, mysterious object in the ocean.
Those are flashes of sound that go out and reflect from surfaces all around me, just like a bat's sonar, and return to me with patterns, with pieces of information, much as light does for you.